Where does “моноарсенид” come from?

моноарсенид (Russian) comes from Russian арсени́д, from German Arsenid — arsenide.

Ancestry of “моноарсенид”, step by step

StepLanguageWordMeaning
1Russianарсени́дarsenide
2GermanArsenidarsenide
Every word from German ArsenidEvery word from Russian арсени́д